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"If \\( X \\) denotes the number on the uppermost face of\ncubic die when it is tossed, then \\( E ( X ) \\) is\n\\( \\begin{array} { l l l l } { \\text { (a) } 2 / 7 } & { \\text { (b) } 7 / 2 } & { \\text { (c) } 1 } & { \\text { (d) } 1 / 2 } \\end{array} \\)"

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